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HELPPPPPPPPPPPPPPPPPPPP
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HELPPPPPPPPPPPPPPPPPPPP

HELPPPPPPPPPPPPPPPPPPPP-example-1
User Tdy
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weight of copper = 1/2w and weight of zinc = 1/2 w
So:-

c = 0.5w*6 + 0.5w*3

c = 3w + 1.5w = 4.5w

this equation is the same as choice A

User Kintsukuroi
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